<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>
</head>

<body>
    <script>
        let readData = async () => {
            let data1 = await fetch('./1.txt').then(response => response.text())
            let data2 = await fetch('./2.txt').then(response => response.text())
            let data3 = await fetch('./3.txt').then(response => response.text())
            console.log(data1);
            console.log(data2);
            console.log(data3);
        }

        readData();
    </script>
</body>

</html>